.fa-lf {
    font-size: 1.5em !important;
    line-height: 0.75em;
    vertical-align: -15%;
}

.preloader_ajax{
    width: 100%;
    height: 100%;
    top: 0px;
    position: fixed;
    z-index: 99999;
    background: #fff;
    opacity: 0.3;
}

.preloader_ajax .cssload-speeding-wheel {
    position: absolute;
    top: calc(50% - 3.5px);
    left: calc(50% - 3.5px);
}

.preloader_ajax b {
    position: absolute;
    top: calc(48% - 3.5px);
    left: calc(43% - 3.5px);
}